Submitted on: 06 April 1999.
Revised on: 23 April 1999.
Accepted on: 07 May 1999.
Science & Education
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Submitted on: 13 December 2023.
Revised on: 08 January 2024.
Accepted on: 21 January 2024.
Science & Education---SPRINGER
Submitted on: 28 February 2003.
Revised on: 11 March 2003.
Accepted on: 03 April 2003.
Science & Education
Submitted on: 06 August 2014.
Revised on: 06 September 2014.
Accepted on: 11 September 2014.
Science & Education---SPRINGER
Submitted on: 16 April 2016.
Revised on: 20 May 2016.
Accepted on: 04 June 2016.
Science & Education---SPRINGER
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